What is ex keeping tabs on me?

As an AI language model, I do not have access to personal information about you or your ex. However, if your ex is keeping tabs on you without your consent, it could be considered stalking or harassment, which is illegal and should be reported to the authorities. It is important to take the necessary steps to protect your safety and privacy in such situations. You can consider changing your phone number, blocking their social media accounts or changing your privacy settings, seeking a restraining order, or consulting with a legal expert on your rights and options.